definitive

[dih-fin-i-tiv] / dɪˈfɪn ɪ tɪv /

ADJECTIVE

authoritative

Synonyms

STRONGEST

actual categorical clear-cut conclusive decisive definite exhaustive precise reliable specific ultimate unambiguous

WEAK

absolute closing complete completing concluding determining downright ending express final finishing flat out last limiting nailed down perfect plain real settling straight out terminal terminating

Antonyms

STRONGEST

ambiguous false imprecise indefinite inexact questionable uncertain vague

WEAK

incomplete inconclusive interim temporary unreliable

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

When I ask Sir Dieter Helm, professor of economic policy at Oxford University, for his definitive answer on the cost of renewables, he laughs.

From BBC • Apr. 15, 2026

“We won’t have definitive evidence of second-round effects for a while,” she said.

From The Wall Street Journal • Apr. 14, 2026

That is formidable, but this book is meant to be definitive, and it succeeds in accomplishing that.

From Salon • Apr. 14, 2026

However, the data is limited and not definitive.

From Science Daily • Apr. 12, 2026

While the Viking biology experiments are a pioneering first effort, they hardly represent a definitive search for life on Mars.

From "Cosmos" by Carl Sagan

Vocabulary lists containing definitive

New Shakespeare Lines Discovered?

Looking to grow your vocabulary? Check out this interactive, curated word list from our team of English language specialists at Vocabulary.com – one of over 17,000 lists we've built to help learners worldwide!

G.1: Principles of Geography (Sources 1–14)

Interested in learning more words like this one? Our team at Vocabulary.com has got you covered! You can review flashcards, quiz yourself, practice spelling, and more – and it's all completely free to use!

Extremely Loud and Incredibly Close

Want to remember this word for good? Start your learning journey today with our library of interactive, themed word lists built by the experts at Vocabulary.com – we'll help you make the most of your study time!